POSITION OF STRATIFIED ROCKS. 



47 



73. If so, then is it because of the great lateral 

 pressure which the circumference of a sphere under- 

 goes, when that sphere ceases not to increase in 

 density, and therefore ceases not to diminish in mag- 

 nitude, that has induced those bendings and inflec- 

 flections, or changes of position, which have taken 

 place in the strata of the crust of the earth since the 

 period of their deposition ? 



7 4. Dr. M'Culloch, in his " Geology of the Western 

 Isles," has made two representations of strata of 

 gneiss which occur in the Island of Lewis, and 

 which have shifted from their original horizontal 

 position, or that position in which they were de- 

 posited, to one that is highly inclined and incur- 

 vated. (See Figs. 12 and 13.) 



FIG, 13. 



